1,1

Table of n, a(n) for n=1..25.

a(1) = 13 because A117322(13) = prime(13) modulo semiprime(13) = 41 mod 35 = 6 = 2 * 3 is semiprime.

a(2) = 17 because A117322(17) = 59 mod 49 = 10 = 2 * 5 is semiprime.

a(3) = 18 because A117322(18) = 61 mod 51 = 10 = 2 * 5 is semiprime.

a(4) = 20 because A117322(20) = 71 mod 57 = 14 = 2 * 7 is semiprime.

Sequence in context: A066918 A164062 A338371 * A052055 A272119 A075761

Adjacent sequences: A117323 A117324 A117325 * A117327 A117328 A117329

easy,nonn

Jonathan Vos Post, Mar 08 2006

approved